London hospital is "aggressively overstretched" by coronavirus patients and he expects the situation to worsen. The doctor, who works in general medicine and wished to remain anonymous, said if the volume of Covid patients continues to increase his hospital will need to start rationing oxygen - which he expects it will.Total coronavirus cases hit a new record on Tuesday, rising above 50,000 cases for the first time, to 53,135 lab-confirmed cases."We're just aggressively overstretched...